1.5per6-1per3-1per4:

/ = per
1.10/12-4/12-3/12
=3/12 disederhanakan jadi 1/4
2.6/8-4/8-1/8
=1/8
3.24/30-10/30-5/30
=9/30 disederhanakan jadi 3/10
4.35/40-10/40-24/40
=1/40
5.40/45-27/45-6/45
=7/45
semoga membantu ya